Fuel injector
First Claim
1. A fuel injector comprising a valve needle which is slidable within a blind bore provided in a body and which is engageable with a seating to control the supply of fuel to an injector outlet opening having an inlet end to which fuel is delivered and an outlet end from which fuel is delivered, an adjustable sleeve member which is arranged within the blind bore, the sleeve member including a first opening having a first outlet end which is directly co-operable with the inlet end of the injector outlet opening, a combination of the first opening and the injector outlet opening defining a restriction to fuel being delivered by said injector, said adjustable sleeve member being moveable to move said first opening thereof relative to said outlet opening to vary the restriction to fuel flow formed by said outlet opening and said first opening and, hence, the rate at which fuel is delivered by said injector.
4 Assignments
0 Petitions
Accused Products
Abstract
A fuel injector comprising a valve needle engageable with a seating to control the supply of fuel to an outlet opening, comprising an adjustment member including an opening. The adjustment member is moveable to move the opening thereof relative to the outlet opening to vary the restriction to fuel flow formed by said outlet opening and, hence, the rate at which fuel is delivered by said injector.
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Citations
11 Claims
- 1. A fuel injector comprising a valve needle which is slidable within a blind bore provided in a body and which is engageable with a seating to control the supply of fuel to an injector outlet opening having an inlet end to which fuel is delivered and an outlet end from which fuel is delivered, an adjustable sleeve member which is arranged within the blind bore, the sleeve member including a first opening having a first outlet end which is directly co-operable with the inlet end of the injector outlet opening, a combination of the first opening and the injector outlet opening defining a restriction to fuel being delivered by said injector, said adjustable sleeve member being moveable to move said first opening thereof relative to said outlet opening to vary the restriction to fuel flow formed by said outlet opening and said first opening and, hence, the rate at which fuel is delivered by said injector.
- 3. A fuel injector comprising a valve needle which is slidable within a blind bore provided in a body and which is engageable with a seating to control the supply of fuel to an injector outlet opening having an inlet end to which fuel is delivered and an outlet end from which fuel is delivered, an adjustable sleeve member which is arranged within the blind bore, the sleeve member including a first opening having a first outlet end which is directly cooperable with the inlet end of the injector outlet opening, a combination of the first opening and the injector outlet opening defining a restriction to fuel being delivered by said injector, said adjustable sleeve member being moveable to move said first opening thereof relative to said outlet opening to vary the restriction to fuel flow formed by said outlet opening and said first opening and, hence, the rate at which fuel is delivered by said injector, wherein said adjustable sleeve member is also provided with a second opening having a second outlet end, and wherein said adjustable sleeve member is moveable between a first position in which said first outlet end of said first opening directly communicates with said inlet end of said injector outlet opening, a combination of said first opening and said outlet opening together defining a first restriction to fuel flow, and a second position in which said second outlet end of said second opening directly communicates with said inlet end of said injector outlet opening, a combination of said second opening and said injector outlet opening together defining a second restriction to fuel flow.
- 7. A fuel injector comprising a valve needle which is slidable within a blind bore provided in a body and which is engageable with a seating to control the supply of fuel to an injector outlet opening having an inlet end to which fuel is delivered and an outlet end from which fuel is delivered, an adjustable sleeve member which is arranged within the blind bore, the sleeve member including a first opening having a first outlet end which is directly cooperable with the inlet end of the injector outlet opening, a combination of the first opening and the injector outlet opening defining a restriction to fuel being delivered by said injector, said adjustable sleeve member being moveable to move said first opening thereof relative to said outlet opening to vary the restriction to fuel flow formed by said outlet opening and said first opening and, hence, the rate at which fuel is delivered by said injector, wherein said adjustable sleeve member is also provided with a second opening having a second outlet end, wherein said adjustable sleeve member is moveable between a first position in which said first outlet end of said first opening directly communicates with said inlet end of said injector outlet opening, a combination of said first opening and said outlet opening together defining a first restriction to fuel flow, and a second position in which said second outlet end of said second opening directly communicates with said inlet end of said injector outlet opening, a combination of said second opening and said injector outlet opening together defining a second restriction to fuel flow, and wherein said adjustable sleeve member is angularly moveable between said first and second positions.
Specification